<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
         /* #warp{
            width: 300px;
            height: 300px;
            background-color: red;

        }*/
        /* .box{
            width: 200px;
            height: 200px;
            background-color: pink;
        }
        div{
            background-color: blue;
        }
      */
      .one{
        width: 100px;
        height: 100px;
        background-color: pink;

      }

    </style>
</head>
<body>
   <div class="box" id="warp">
    <div class="one">1</div>
    <div class="two">2</div>
   </div> 
</body>
</html>